(19)
(11) EP 4 438 851 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.10.2024 Bulletin 2024/42

(43) Date of publication A2:
02.10.2024 Bulletin 2024/40

(21) Application number: 24195069.0

(22) Date of filing: 20.01.2022
(51) International Patent Classification (IPC): 
E21B 7/06(2006.01)
E21B 47/13(2012.01)
E21B 47/26(2012.01)
 E21B 23/02(2006.01)
E21B 47/12(2012.01)
(52) Cooperative Patent Classification (CPC):
E21B 7/061; E21B 23/02; E21B 47/13; E21B 47/138; E21B 47/26
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 25.02.2021 US 202117184628

(62) Application number of the earlier application in accordance with Art. 76 EPC:
22703514.4 / 4298308

(71) Applicant: Weatherford Technology Holdings, LLC
Houston, TX 77056 (US)

(72) Inventor:
  • PRAY, Jeffery Scott
    Houston, 77041 (US)

(74) Representative: Marks & Clerk LLP 
15 Fetter Lane
London EC4A 1BW
London EC4A 1BW (GB)

   


(54) RFID ACTUATED RELEASE OF MILL FROM WHIPSTOCK


(57) A bottom hole assembly for use in a subterranean well can include a whipstock, a mill releasably secured to the whipstock, an antenna, and a release mechanism configured to release the mill from the whipstock in response to a predetermined radio frequency signal received by the antenna. A method can include positioning a bottom hole assembly in a well, the bottom hole assembly including a mill and a whipstock releasably secured to the mill, and then releasing the mill from the whipstock by displacing a radio frequency identification tag into the bottom hole assembly. A well system can include a bottom hole assembly comprising an anchor, a whipstock and a mill, and a radio frequency identification tag displaceable with fluid flow into the bottom hole assembly.p







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Search report